<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>

<body>
    <!-- <div id="app">
        <select v-model='mycity'>
            <option disabled value="">请选择</option>
            <option value="B">北京</option>
            <option value="S">上海</option>
            <option value="G">广州</option>
        </select>
        <span>Selected:{{mycity}}</span>
    </div>

    <script>
        let vm = new Vue({
            el: '#app',
            data: {
                mycity: 'S'
            }
        })
    </script> -->

































    <div id="app">
        <select v-model='mycity'>
            <option disabled value="">请选择</option>
            <option value="B">北京</option>
            <option value="S">上海</option>
            <option value="G">广州</option>
        </select>
        <span>Selected:{{mycity}}</span>
    </div>

    <script>
        let vm = new Vue({
            el: '#app',
            data: {
                mycity: 'G'
            }
        })
    </script>
</body>

</html>